1305832961 has 4 divisors (see below), whose sum is σ = 1308935124. Its totient is φ = 1302730800.

The previous prime is 1305832943. The next prime is 1305832973. The reversal of 1305832961 is 1692385031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 266995600 + 1038837361 = 16340^2 + 32231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1305832961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305834961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1550450 + ... + 1551291.

It is an arithmetic number, because the mean of its divisors is an integer number (327233781).

Almost surely, 2^1305832961 is an apocalyptic number.

It is an amenable number.

1305832961 is a deficient number, since it is larger than the sum of its proper divisors (3102163).

1305832961 is an equidigital number, since it uses as much as digits as its factorization.

1305832961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102162.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1305832961 is about 36136.3108382690. The cubic root of 1305832961 is about 1093.0227688356.

The spelling of 1305832961 in words is "one billion, three hundred five million, eight hundred thirty-two thousand, nine hundred sixty-one".